Becoming immune to poison?

That depends on the poison, not all poisons are the same. And unless you have at least a degree in chemistry to start with, avoid it unless you want to die

There's no such thing as immunity to poison. You can only become immune to infections.

I wouldn't risk any doses of poison to become immune.

Not to be recommended. Some poisons accumulate in the body and before you know it you are no more.

it may there are vaccine imunity for insect and snake poison not other poison.

There is no "starting dose" to become immune to poison. Most poisons will kill you within a short period of time - long before you could become "immune" to it.

All "poisons" are different. we'd need to know which ones to give you an answer.

Most poisons will kill you with a large enough dose, regardless if you have been taking small doses for a while. Some poisons are so toxic that it only takes a few milligrams to kill you.

Trying to build up an immunity is a <<very>> bad idea. It will eventually end up to be fatal to you.

doubt it......